Abstract
Numerical experiments are carried out systematically to determine the nitrogen soft X-ray yield for optimized nitrogen plasma focus with storage energy E0 from 1 to 200 kJ. Scaling laws on nitrogen soft X-ray yield, in terms of storage energies E0, peak discharge current Ipeak and focus pinch current Ipinch were found. It was found that the nitrogen X-ray yields scales on average with \( {\text{Y}}_{\text{sxr,N}} = 1.93 \times {\text{E}}_{0}^{1.21} {\text{J}} \) (E0 in kJ) with the scaling showing gradual deterioration as E0 rises over the range. A more robust scaling is \( {\text{Y}}_{\text{sxr}} = 8 \times 10^{ - 8} {\text{I}}_{\text{pinch}}^{3.38} \). The optimum nitrogen soft X-ray yield emitted from plasma focus is found to be about 1 kJ for storage energy of 200 kJ. This indicates that nitrogen plasma focus is a good water-window soft X-ray source when properly designed.
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Acknowledgments
The authors would like to thank Director General of AECS, for encouragement and permanent support. They would also like to express many thanks to Mrs. Sheren Isamael, who collaborated going through all the numerical experiments using Lee Model.
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Akel, M., Lee, S. Scaling Laws of Nitrogen Soft X-ray Yields from 1 to 200 kJ Plasma Focus. J Fusion Energ 32, 107–110 (2013). https://doi.org/10.1007/s10894-012-9537-1
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DOI: https://doi.org/10.1007/s10894-012-9537-1